Objects in the image:
category: person
category: person
category: skateboard
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person
category: person

Guessing-game dialogue about one of the objects:
q: is it a person?
a: Yes
q: is he at front?
a: No
q: is he at back?
a: Yes
q: is he left?
a: No
q: is he right?
a: No
q: is he sitting?
a: No